<template>
  <el-container class="home-container">
    <!-- 头部主体 -->
    <el-header>
      <div>
        <img src="../assets/1.jpg">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="quit">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
        <!-- 侧边栏 -->
        <el-aside :width="isCollapse ? '64px' : '200px'">
          <div class="toggle-button" @click="toggleCollapse">切换视图</div>
          <!-- 侧边栏菜单区域 -->
          <el-menu background-color="#323744" text-color="#fff" active-text-color="#359bff" unique-opened :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
            <!-- 一级菜单 -->
            <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
              <!-- 一级菜单的模版区域 -->
              <template slot="title">
                <!-- 图标 -->
                <i :class="iconsObj[item.id]"></i>
                <!-- 文本 -->
                <span>{{item.authName}}</span>
              </template>

              <!-- 二级菜单 -->
              <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{subItem.authName}}</span>
              </el-menu-item>
            </el-submenu>
          </el-menu>
        </el-aside>
        <!-- 右侧内容主体 -->
        <el-main>
          <!-- 路由占位符 -->
          <router-view></router-view>
        </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      menulist: [],
      iconsObj: {
        125: 'iconfont icon-yonghu',
        103: 'iconfont icon-quanxian',
        101: 'iconfont icon-shangpinguanli',
        102: 'iconfont icon-dingdan',
        145: 'iconfont icon-tongji'
      },
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    quit() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    //  获取所有的菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
    },
    // 点击按钮，切换菜单的折叠与展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState(acitvePath) {
      window.sessionStorage.setItem('activePath', acitvePath)
      this.activePath = acitvePath
    }
  }
}
</script>

<style lang="less" scoped>
.home-container {
  height: 100%
}

.el-header {
  padding-left: 0;
  background-color: #363c40;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #fff;
  font-size: 20px;
    div {
      display: flex;
      align-items: center;
      span {
        margin-left: 15px;
      }
      img {
        height: 50px;
        width: 50px;
        border-radius: 50%;
      }
    };
}

.el-aside {
  background-color: #323744;
  .el-menu {
    border-right: 0;
  }
}

.el-main {
  background-color: #e9edf1;
}

.iconfont {
  margin-right: 10px;
  font-size: 20px;
}
.toggle-button {
  background-color: #49515f;
  font-size: 10px;
  color: #fff;
  line-height: 24px;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
